<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area border-topbottom">
				<div class="title">当前城市</div>
				<div class="button-list">
					<div class="button-wrap">
						<div class="button">{{this.currentCity}}</div>
					</div>
				</div>
			</div>
			<div class="area border-topbottom">
				<div class="title">热门城市</div>
				<div class="button-list">
					<div 
						class="button-wrap" 
						v-for="item of hot" 
						:key="item.id"
						@click="handleCityClick(item.name)"
					>
						<div class="button">{{item.name}}</div>
					</div>
				</div>
			</div>
			<div 
				class="area border-topbottom"  
				v-for="(item,key) of cities" 
				:key="key"
				:ref="key"
			>
				<div class="title">{{key}}</div>
				<div class="item-list">
				<div 
					class="item border-bottom" 
					v-for="innerItem of item"
					:key="innerItem.id"
					@click="handleCityClick(innerItem.name)"
				>
					{{innerItem.name}}
				</div>
			</div>
			</div>
			
			
		</div>
	</div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState,mapMutations} from 'vuex'
export default {
	name: 'CityList',
	props:{
		cities:Object,
		hot:Array,
		letter:String,
	},
	methods: {
		handleCityClick (city) {
			this.changeCity(city)
			this.$router.push('/')
		},
		...mapMutations(['changeCity'])
	},
	computed:{
		...mapState({
			currentCity: 'city'
		})
	},
	watch: {
		letter () {
			if (this.letter){
				const element = this.$refs[this.letter][0]
				this.scroll.scrollToElement(element)
			}
		}
	},
	mounted () {
		this.scroll = new BScroll(this.$refs.wrapper,{
			click:true
		})
	}
}
</script>

<style lang="scss" scoped>
	.border-topbottom{
		&:before{
			background: #ccc;
		}
		&:after{
			background: #ccc;
		}
	}
	.border-bottom{
		&:before{
			background: #ccc;
		}
	}
	.list{
		overflow: hidden;
		position: absolute;
		top: 1.58rem;
		left: 0;
		right: 0;
		bottom: 0;
		.title{
			height: .54rem;
			line-height: .54rem;
			background: #eee;
			padding-left: .2rem;
			color: #666;
			font-size: .26rem;
		}
		.item-list{
			.item{
				line-height: .76rem;
				color: #666;
				padding-left: .2rem;
			}
		}
		.button-list{
			overflow: hidden;
			padding: .1rem .6rem .1rem .1rem;
			.button-wrap{
				float:left;
				width: 33.33%;
				.button{
					margin: .1rem;
					padding: .1rem 0;
					text-align: center;
					border: .02rem solid #ccc;
					border-radius: 3px;
				}
			}
		}
	}
</style>